Is your mom qualified to make the choice? Does she know what impact it will have to install it? Chances are that's a big NO. Implications of this? She will install it because uncle Joe's crappy photo gallery site needs flash, and then she'll proceed to complain about the iPhone crashing, go to Apple for support because "her battery life sucks", etc.

Apple makes consumer electronics devices, you can't install new codecs on your DVD player and you can't install new VM's on your iPhone.

I prefer it this way.